I have played it both ways; I am keeping the 1960 Capo pretty much all-original, except for modern brake pads and clincher tires, but I have updated the 1959 with 1970s vintage saddle and crankset, plus circa 1980 wheels and derailleurs. I concur with your decision to keep the barcons; I am delighted with the set I put on my UO-8, and they let you stay retro while keeping both hands on the bars for safety.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069